157209413 has 4 divisors (see below), whose sum is σ = 157299660. Its totient is φ = 157119168.

The previous prime is 157209397. The next prime is 157209427. The reversal of 157209413 is 314902751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 314902751 = 19 ⋅16573829.

It can be written as a sum of positive squares in 2 ways, for example, as 118744609 + 38464804 = 10897^2 + 6202^2 .

It is a cyclic number.

It is not a de Polignac number, because 157209413 - 2⁴ = 157209397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157209413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157209473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42458 + ... + 46011.

It is an arithmetic number, because the mean of its divisors is an integer number (39324915).

Almost surely, 2^157209413 is an apocalyptic number.

It is an amenable number.

157209413 is a deficient number, since it is larger than the sum of its proper divisors (90247).

157209413 is an equidigital number, since it uses as much as digits as its factorization.

157209413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90246.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 157209413 is about 12538.3177898792. The cubic root of 157209413 is about 539.7088199264.

The spelling of 157209413 in words is "one hundred fifty-seven million, two hundred nine thousand, four hundred thirteen".